Gelatinized and nongelatinized corn starch/ poly(epsilon-caprolactone) blends: characterization by rheological, mechanical and morphological properties
Poly(epsilon-caprolactone)/corn starch blends containing 25, 50 and 75 wt.% starch were prepared by mechanical processing and characterized by the melt flow index (MFI), tensile test and scanning electron microscopy (SEM). For comparison, starch was used in gelatinized and nongelatinized forms and w...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Polímeros
2004-09-01
|
| Series: | Polímeros |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000300014 |
| _version_ | 1811314448234708992 |
|---|---|
| author | Derval S. Rosa Cristina G. F. Guedes Andréa G. Pedroso |
| author_facet | Derval S. Rosa Cristina G. F. Guedes Andréa G. Pedroso |
| author_sort | Derval S. Rosa |
| collection | DOAJ |
| description | Poly(epsilon-caprolactone)/corn starch blends containing 25, 50 and 75 wt.% starch were prepared by mechanical processing and characterized by the melt flow index (MFI), tensile test and scanning electron microscopy (SEM). For comparison, starch was used in gelatinized and nongelatinized forms and was also characterized by viscography. The addition of starch to poly(epsilon-caprolactone) reduced the MFI values, the tensile strength and the elongation at break, whereas the modulus increased. The reductions in the MFI and tensile properties were most evident when gelatinized starch was used. Viscography and SEM showed that starch was well gelatinized by the gelatinization process. Blends containing nongelatinized starch showed a good dispersion of starch but poor interfacial interactions. |
| first_indexed | 2024-04-13T11:12:59Z |
| format | Article |
| id | doaj.art-21e34e3793df484594efbf42ff47827f |
| institution | Directory Open Access Journal |
| issn | 0104-1428 1678-5169 |
| language | English |
| last_indexed | 2024-04-13T11:12:59Z |
| publishDate | 2004-09-01 |
| publisher | Associação Brasileira de Polímeros |
| record_format | Article |
| series | Polímeros |
| spelling | doaj.art-21e34e3793df484594efbf42ff47827f2022-12-22T02:49:04ZengAssociação Brasileira de PolímerosPolímeros0104-14281678-51692004-09-0114318118610.1590/S0104-14282004000300014Gelatinized and nongelatinized corn starch/ poly(epsilon-caprolactone) blends: characterization by rheological, mechanical and morphological propertiesDerval S. RosaCristina G. F. GuedesAndréa G. PedrosoPoly(epsilon-caprolactone)/corn starch blends containing 25, 50 and 75 wt.% starch were prepared by mechanical processing and characterized by the melt flow index (MFI), tensile test and scanning electron microscopy (SEM). For comparison, starch was used in gelatinized and nongelatinized forms and was also characterized by viscography. The addition of starch to poly(epsilon-caprolactone) reduced the MFI values, the tensile strength and the elongation at break, whereas the modulus increased. The reductions in the MFI and tensile properties were most evident when gelatinized starch was used. Viscography and SEM showed that starch was well gelatinized by the gelatinization process. Blends containing nongelatinized starch showed a good dispersion of starch but poor interfacial interactions.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000300014Biodegradable polymersgelatinizationpolymer blendspoly(epsilon-caprolactone)starch |
| spellingShingle | Derval S. Rosa Cristina G. F. Guedes Andréa G. Pedroso Gelatinized and nongelatinized corn starch/ poly(epsilon-caprolactone) blends: characterization by rheological, mechanical and morphological properties Polímeros Biodegradable polymers gelatinization polymer blends poly(epsilon-caprolactone) starch |
| title | Gelatinized and nongelatinized corn starch/ poly(epsilon-caprolactone) blends: characterization by rheological, mechanical and morphological properties |
| title_full | Gelatinized and nongelatinized corn starch/ poly(epsilon-caprolactone) blends: characterization by rheological, mechanical and morphological properties |
| title_fullStr | Gelatinized and nongelatinized corn starch/ poly(epsilon-caprolactone) blends: characterization by rheological, mechanical and morphological properties |
| title_full_unstemmed | Gelatinized and nongelatinized corn starch/ poly(epsilon-caprolactone) blends: characterization by rheological, mechanical and morphological properties |
| title_short | Gelatinized and nongelatinized corn starch/ poly(epsilon-caprolactone) blends: characterization by rheological, mechanical and morphological properties |
| title_sort | gelatinized and nongelatinized corn starch poly epsilon caprolactone blends characterization by rheological mechanical and morphological properties |
| topic | Biodegradable polymers gelatinization polymer blends poly(epsilon-caprolactone) starch |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000300014 |
| work_keys_str_mv | AT dervalsrosa gelatinizedandnongelatinizedcornstarchpolyepsiloncaprolactoneblendscharacterizationbyrheologicalmechanicalandmorphologicalproperties AT cristinagfguedes gelatinizedandnongelatinizedcornstarchpolyepsiloncaprolactoneblendscharacterizationbyrheologicalmechanicalandmorphologicalproperties AT andreagpedroso gelatinizedandnongelatinizedcornstarchpolyepsiloncaprolactoneblendscharacterizationbyrheologicalmechanicalandmorphologicalproperties |